Operation and maintenance of power roller conveyor

   1.小型,薄型,轻量化

1. small, thin, lightweight

   因为电源轻,小,薄的关键是高频化,所以,国外现在都在致力于开发新式高频元器材，特別是改进二次整流管的损耗、变压器及电容的小型化，并一起选用表面装置(SMT) 技能在印制电路板两面安置元器材以保证开关电源的轻、小、薄。

Because the key of light, small and thin is high frequency, the foreign countries are now working on the development of new high frequency equipment, especially the improvement of the loss of the two rectifying tubes, the miniaturization of transformers and capacitors, and the use of the surface device (SMT) skill to ensure the light of the switching power supply on the two sides of the printed circuit board. Small and thin.

   2.高功率

2. high power

   开关电源高频化使传统的PWM开关（硬开关）功耗加大，功率下降，噪声也增大了， 达不到高频、高效的预期效益，因此，完成零电压导通、零电流关断的软开关技能将变成开关电源未来的干流。选用软开关技能能够使功率达到88% ~92%。

The high frequency power of the switching power supply makes the traditional PWM switch (hard switch) power consumption, power decline and noise increase, which can not reach the high frequency and high efficiency expected benefit. Therefore, the soft switching skills to complete zero voltage conduction and zero current turn off will become the future dry current of switching power supply. Soft switching skills can make the power reach 88% ~92%.

   3.高可靠性

3. high reliability

   在规划方面，开关电源运用较少的器材，进步了集成度，这么不光处理了电路复要、可靠性差的问题，也增加了保护等功能，简化了电路，进步了均匀无毛病时刻。特别是开关电源的呈现，极大进步了可靠性。

In the planning aspect, the switching power supply uses less equipment and improves the degree of integration, so it does not only deal with the problem of the circuit complex, the poor reliability, the protection and other functions, simplifies the circuit, and advances the uniform and no trouble time. Especially the appearance of switching power supply has greatly improved reliability.

   4.模块化

4. modular

  开关电源模块化（模块电源）能够构成分布式电源体系，然后进步可靠性；能够做成插人式，完成热交换，然后在运转中呈现毛病时能迅速替换模块插件；多台模块并联可完成大功率电源体系。此外，还能够在电源体系建成后，依据发展需要不断扩大其容量。

The modularization of the switch power supply (module power) can form a distributed power system and improve the reliability; it can make a plug - in, complete the heat exchange, and then replace the module plug-in quickly when the operation is wrong; the multiple modules can complete the power supply system in parallel. In addition, it can also expand its capacity according to the development needs after the power system is built.

   5.低噪声

5. low noise

   开关电源的一个缺陷是噪声大。若单纯寻求电源高频化，噪声便随之增大。选用部分有谐振改换技能，在原理上来说既能够完成髙频化，乂能够下降噪声。但谐振改换技能也有其缺陷，如难精确地操控开关频率、谐振时增大了元器材负荷、场效应管的寄生电容易导致短路损耗，元器材热应力难以转向开关管等。

A defect switching power supply noise is large. If we only seek high-frequency power supply, the noise will increase. The part of a change in the resonant skills, it can accomplish the principle of high frequency can reduce noise, mow. However, the resonant switching skills also have its defects, such as the difficulty in accurately manipulating the switching frequency, the increase of the load of the equipment, the parasitic electricity of the field effect tube, and the loss of the short circuit, and the thermal stress of the equipment is difficult to turn to the switch tube.

   6.电源体系的办理和操控

For 6. power supply system and control

   应用微处理器或计算机集中操控和办理电源体系，能够及时反映开关电源环境的各种变 化。用中央处理单元完成智能操控，可主动确诊毛病，减少保护工作量，保证开关电源的正常运转。

By using microprocessor or computer to control and handle power system, we can reflect all kinds of changes in the environment of switching power supply in time. The central processing unit is used for intelligent control. It can diagnose faults, reduce workload and ensure normal operation of switching power supply.

   7.计算机辅助规划（CAD)

7. computer aided planning (CAD)

   使用计算机对开关电源进行CAD规划和模拟实验，非常有用，是最为迅速经济的规划办法。常选用的软件有Pspice、Saber, Multisim等.

It is very useful for CAD to plan and simulate switching power supply by computer. It's the most rapid and economical planning method. The commonly used software is Pspice, Saber, Multisim and so on.